公开(公告)号：US08031019B2

公开(公告)日：2011-10-04

申请号：US12363911

申请日：2009-02-02

申请人： Vipul Chawla ,  Shen Wang

发明人： Vipul Chawla ,  Shen Wang

IPC分类号： H03B5/12 ,  H03B21/00 ,  H04B1/24 ,  H04B1/40

CPC分类号： H03B5/1228 ,  H03B5/1215 ,  H03B5/1218 ,  H03B5/1243 ,  H03B5/1296

摘要： Techniques for providing voltage-controlled oscillator circuits having improved phase noise performance and lower power consumption. In an exemplary embodiment, a voltage controlled oscillator (VCO) is coupled to a mixer or a frequency divider such as a divide-by-two circuit. The VCO includes a transistor pair with magnetically cross-coupled inductors, and variable capacitance coupled to the gates of the transistor pair. In an exemplary embodiment, a frequency divider is configured to divide the frequency of the differential current flowing through the transistor pair to generate the LO output. In an alternative exemplary embodiment, a mixer is configured to mix the differential current flowing through the transistor pair with another signal. The VCO and mixer or frequency divider share common bias currents, thereby reducing power consumption. Various exemplary apparatuses and methods utilizing these techniques are disclosed.

摘要翻译： 提供具有改善的相位噪声性能和较低功耗的压控振荡器电路的技术。 在示例性实施例中，压控振荡器（VCO）耦合到混频器或诸如分频二电路的分频器。 VCO包括具有磁交叉耦合电感器的晶体管对，以及耦合到晶体管对的栅极的可变电容。 在示例性实施例中，分频器被配置为分流流过晶体管对的差分电流的频率以产生LO输出。 在替代示例性实施例中，混频器被配置为将流过晶体管对的差分电流与另一个信号混合。 VCO和混频器或分频器共享公共偏置电流，从而降低功耗。 公开了利用这些技术的各种示例性装置和方法。

公开(公告)号：US20110001522A1

公开(公告)日：2011-01-06

申请号：US12496875

申请日：2009-07-02

申请人： Ngar Loong Alan Chan ,  Shen Wang

发明人： Ngar Loong Alan Chan ,  Shen Wang

IPC分类号： H03B19/06 ,  H03K3/356

CPC分类号： H03K3/35613

摘要： A high frequency divider involves a plurality of differential latches. Each latch includes a pair of cross-coupled P-channel transistors and a variable resistance element. The latch is controlled to have a lower output resistance at high operating frequencies by setting a multi-bit digital control value supplied to the variable resistance element. Controlling the latch to have a reduced output resistance at high frequencies allows the 3 dB bandwidth of the latch to be maintained over a wide operating frequency range. The variable resistance element is disposed between the two differential output nodes of the latch such that appreciable DC bias current does not flow across the variable resistance element. As a consequence, good output signal voltage swing is maintained at high frequencies, and divider current consumption does not increase appreciably at high frequencies as compared to output signal swing degradation and current consumption increases in a conventional differential latch divider.

摘要翻译： 高分频器包括多个差分锁存器。 每个锁存器包括一对交叉耦合的P沟道晶体管和可变电阻元件。 通过设置提供给可变电阻元件的多位数字控制值，控制锁存器在高工作频率下具有较低的输出电阻。 控制锁存器在高频下具有降低的输出电阻允许在宽的工作频率范围内保持锁存器的3 dB带宽。 可变电阻元件设置在闩锁的两个差分输出节点之间，使得明显的直流偏置电流不流过可变电阻元件。 因此，与传统的差分锁存器分频器中的输出信号摆幅下降和电流消耗增加相比，良好的输出信号电压摆幅保持在高频，并且分频器电流消耗在高频下不会明显增加。

公开(公告)号：US20100302427A1

公开(公告)日：2010-12-02

申请号：US12475825

申请日：2009-06-01

申请人： Shen Wang ,  Eric J. Meisenzahl ,  David N. Nichols

发明人： Shen Wang ,  Eric J. Meisenzahl ,  David N. Nichols

IPC分类号： H04N5/335

CPC分类号： H01L27/14887

摘要： A charge-coupled device (CCD) image sensor includes a layer of a semiconductor material having a first conductivity type. A horizontal CCD channel region of a second conductivity type is disposed in the layer of the semiconductor material. The horizontal CCD channel region includes multiple phases that are used to shift photo-generated charge through the horizontal CCD channel region. Distinct overflow drain regions are disposed in the layer of semiconducting material, with an overflow drain region electrically connected to only one particular phase of the horizontal CCD channel region. A buffer region of the second conductivity type can be used to electrically connect each overflow drain to the one particular phase of the horizontal CCD channel. Multiple barrier regions are disposed in the layer of semiconductor material, with each barrier region disposed between each overflow drain and the one particular phase electrically connected to the drain.

摘要翻译： 电荷耦合器件（CCD）图像传感器包括具有第一导电类型的半导体材料层。 第二导电类型的水平CCD沟道区设置在半导体材料的层中。 水平CCD通道区域包括用于将光电荷移动通过水平CCD通道区域的多个相位。 不同的溢出漏极区域设置在半导体材料层中，溢出漏极区域仅电连接到水平CCD沟道区域的一个特定相位。 可以使用第二导电类型的缓冲区域将每个溢出漏极电连接到水平CCD通道的一个特定相位。 多个屏障区域设置在半导体材料层中，每个屏障区域设置在每个溢流漏极和电连接到漏极的一个特定相之间。

公开(公告)号：US20090121759A1

公开(公告)日：2009-05-14

申请号：US11953575

申请日：2007-12-10

申请人： Shen Wang ,  Sang-Oh Lee ,  Jeongsik Yang

发明人： Shen Wang ,  Sang-Oh Lee ,  Jeongsik Yang

IPC分类号： G05F1/10 ,  H03L7/06

CPC分类号： H03L7/0896 ,  H03L7/18

摘要： In one embodiment of the invention, a method for a charge pump is disclosed. The method includes biasing a plurality of transistors; switching a pair of main transistor switches to apply or remove a net charge on an output terminal though the biased transistors; and turning on auxiliary transistor switches when the main transistor switches are turned off. The auxiliary transistor switches when turned on provide an auxiliary equalizing path to nodes between the main transistor switches and the biased transistors. The auxiliary equalizing path equalizes voltages between the intermediate nodes to rapidly turn off the biased transistors and reduce noise on the output terminal of the charge pump.

摘要翻译： 在本发明的一个实施例中，公开了一种用于电荷泵的方法。 该方法包括偏置多个晶体管; 切换一对主晶体管开关以通过偏置晶体管施加或去除输出端子上的净电荷; 并且当主晶体管开关断开时，接通辅助晶体管开关。 辅助晶体管开关导通时，为主晶体管开关和偏置晶体管之间的节点提供辅助均衡通路。 辅助均衡路径均衡中间节点之间的电压，以快速关闭偏置晶体管，并降低电荷泵输出端子上的噪声。

公开(公告)号：US20070126893A1

公开(公告)日：2007-06-07

申请号：US11294298

申请日：2005-12-05

申请人： Shen Wang ,  Greg Archer

发明人： Shen Wang ,  Greg Archer

IPC分类号： H04N5/217

CPC分类号： H04N5/253 ,  G06T5/002 ,  G06T5/10 ,  G06T7/0004 ,  G06T2207/20056 ,  H04N5/3572 ,  H04N5/365

摘要： The present invention uses five regions of interest, 4 corners and 1 center to do Fourier Transform analysis to mark rough location of the streaks, if there is any. It sets the small window around the center in each Fourier Transform ROI to zero to mask the cluster of bright points caused by the lens rolloff or other noises. It use iterative linear regression to remove the random outliers and to search the best possible linear pattern. If it finds any streaks, it calculates the angle and converts it to the streak angle in spatial domain. Once a streak is detected, it can be removed by applying an inverse Fourier Transform on the processed magnitude and original phase Fourier Transform images.

摘要翻译： 本发明使用五个感兴趣的区域，四个角和一个中心进行傅里叶变换分析，以标记条纹的粗略位置，如果有的话。 它将每个傅里叶变换ROI中心的小窗口设置为零，以屏蔽由镜头滚降或其他噪声引起的亮点簇。 它使用迭代线性回归去除随机异常值并搜索最佳线性模式。 如果找到任何条纹，它会计算角度并将其转换为空间域中的条纹角度。 一旦检测到条纹，就可以通过在经处理的幅度和原始相位傅里叶变换图像上应用傅立叶逆变换来去除条纹。